Sure thing, let's get straight to it. We start with 939 and we're going to multiply it by 71, which means adding 939 to itself 71 times.
Step 1: 0 + 939 = 939
Step 2: 939 + 939 = 1878
Step 3: 1878 + 939 = 2817
Step 4: 2817 + 939 = 3756
Step 5: 3756 + 939 = 4695
Step 6: 4695 + 939 = 5634
Step 7: 5634 + 939 = 6573
Step 8: 6573 + 939 = 7512
Step 9: 7512 + 939 = 8451
Step 10: 8451 + 939 = 9390
Step 11: 9390 + 939 = 10329
Step 12: 10329 + 939 = 11268
Step 13: 11268 + 939 = 12207
Step 14: 12207 + 939 = 13146
Step 15: 13146 + 939 = 14085
Step 16: 14085 + 939 = 15024
Step 17: 15024 + 939 = 15963
Step 18: 15963 + 939 = 16902
Step 19: 16902 + 939 = 17841
Step 20: 17841 + 939 = 18780
Step 21: 18780 + 939 = 19719
Step 22: 19719 + 939 = 20658
Step 23: 20658 + 939 = 21597
Step 24: 21597 + 939 = 22536
Step 25: 22536 + 939 = 23475
Step 26: 23475 + 939 = 24414
Step 27: 24414 + 939 = 25353
Step 28: 25353 + 939 = 26292
Step 29: 26292 + 939 = 27231
Step 30: 27231 + 939 = 28170
Step 31: 28170 + 939 = 29109
Step 32: 29109 + 939 = 30048
Step 33: 30048 + 939 = 30987
Step 34: 30987 + 939 = 31926
Step 35: 31926 + 939 = 32865
Step 36: 32865 + 939 = 33804
Step 37: 33804 + 939 = 34743
Step 38: 34743 + 939 = 35682
Step 39: 35682 + 939 = 36621
Step 40: 36621 + 939 = 37560
Step 41: 37560 + 939 = 38499
Step 42: 38499 + 939 = 39438
Step 43: 39438 + 939 = 40377
Step 44: 40377 + 939 = 41316
Step 45: 41316 + 939 = 42255
Step 46: 42255 + 939 = 43194
Step 47: 43194 + 939 = 44133
Step 48: 44133 + 939 = 45072
Step 49: 45072 + 939 = 46011
Step 50: 46011 + 939 = 46950
Step 51: 46950 + 939 = 47889
Step 52: 47889 + 939 = 48828
Step 53: 48828 + 939 = 49767
Step 54: 49767 + 939 = 50706
Step 55: 50706 + 939 = 51645
Step 56: 51645 + 939 = 52584
Step 57: 52584 + 939 = 53523
Step 58: 53523 + 939 = 54462
Step 59: 54462 + 939 = 55401
Step 60: 55401 + 939 = 56340
Step 61: 56340 + 939 = 57279
Step 62: 57279 + 939 = 58218
Step 63: 58218 + 939 = 59157
Step 64: 59157 + 939 = 60096
Step 65: 60096 + 939 = 61035
Step 66: 61035 + 939 = 61974
Step 67: 61974 + 939 = 62913
Step 68: 62913 + 939 = 63852
Step 69: 63852 + 939 = 64791
Step 70: 64791 + 939 = 65730
Step 71: 65730 + 939 = 66669

So, 939*71 = 66669